Orbit Fit and Astrometric record for 16RV81

The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.

# Object: 16RV81    
# Created Wed Dec  8 02:13:54 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     16 observations of     16
# Arc:   5.05y
# First observation: 2013/09/28
#  Last observation: 2018/10/18
# Chi-squared of fit:     7.55 DOF:     26 RMS:  0.12
# Min/Max residuals:    -0.24    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.406724E-05  2.079875E-02 -4.958374E-06 -8.169102E-03  2.338253E-02 -3.391738E-03
# Covariance matrix:
  1.1284E-12 -6.4407E-13 -1.8727E-13  1.8938E-13 -4.5643E-13 -3.9938E-12
 -6.4407E-13  5.0829E-13  1.7554E-13 -1.7748E-13  4.1626E-13  3.7430E-12
 -1.8727E-13  1.7554E-13  6.6370E-13 -2.1379E-13  1.5305E-13  1.4109E-12
  1.8938E-13 -1.7748E-13 -2.1379E-13  1.1010E-13 -1.5611E-13 -1.4264E-12
 -4.5643E-13  4.1626E-13  1.5305E-13 -1.5611E-13  9.1099E-13  3.2922E-12
 -3.9938E-12  3.7430E-12  1.4109E-12 -1.4264E-12  3.2922E-12  3.0081E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.151847    8.872316    0.070962   -0.002555   -0.999759  2456563.614678
# Heliocentric elements and errors
Epoch:              2456564.5000  =  2013/09/29
Mean Anomaly:          292.09558 +/-     0.031
Argument of Peri:      266.13521 +/-     0.035
Long of Asc Node:      188.40503 +/-     0.000
Inclination:            21.44892 +/-     0.001
Eccentricity:         0.15798469 +/-    0.0003
Semi-Major Axis:     45.41527489 +/-    0.0081
Time of Perihelion: 2477650.6309 +/-      26.1
Perihelion:          38.24035692 +/-    0.0135
Aphelion:            52.59019287 +/-    0.0149
Period (y)              306.0632 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           43.25333488 +/-    0.0017
Ecliptic Y            6.68318022 +/-    0.0003
Ecliptic Z           -0.11356873 +/-    0.0000
Ecliptic XDOT        -0.00077666 +/-    0.0000
Ecliptic YDOT         0.00234322 +/-    0.0000
Ecliptic ZDOT        -0.00095532 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.76685448 +/-    0.0017
Geocenter to KBO     42.76709187 +/-    0.0017
# Hcoef:  7.18

The following table shows the complete astrometric record for 16RV81. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (16RV81) followed by the observatory code and reference code for the source of the astrometry.

2013 09  28.11390  00 32 50.485  +03 22 39.88  23.9g 16RV81    W84  C~52Zi      
2014 08  18.31436  00 40 28.949  +03 44 34.84  23.4i 16RV81    W84  C~52Zi      
2015 10  17.16393  00 41 50.450  +03 17 11.46  23.3r 16RV81    W84  C~52Zi      
2016 09  05.32577  00 49 51.240  +03 40 44.86  24.1g 16RV81    W84  C~52Zi      
2016 09  09.28468  00 49 36.744  +03 38 48.71  23.2i 16RV81    W84  C~52Zi      
2016 09  09.32324  00 49 36.593  +03 38 47.70  22.7z 16RV81    W84  C~52Zi      
2016 11  18.08408  00 45 02.761  +03 04 28.08  23.1r 16RV81    W84  C~52Zi      
2016 11  18.08544  00 45 02.747  +03 04 28.09  24.1g 16RV81    W84  C~52Zi      
2017 09  27.23363  00 53 39.876  +03 31 32.62  23.2i 16RV81    W84  C~52Zi      
2017 09  27.23499  00 53 39.849  +03 31 32.47  24.5g 16RV81    W84  C~52Zi      
2017 10  20.16907  00 52 01.635  +03 19 20.57  23.3z 16RV81    W84  C~52Zi      
2018 09  09.34826  01 00 08.618  +03 42 50.05  23.4z 16RV81    W84  C~52Zi      
2018 09  14.33742  00 59 49.923  +03 40 19.19  23.5r 16RV81    W84  C~52Zi      
2018 09  14.33878  00 59 49.917  +03 40 19.14  23.4i 16RV81    W84  C~52Zi      
2018 09  14.34016  00 59 49.898  +03 40 19.39  24.0g 16RV81    W84  C~52Zi      
2018 10  18.20031  00 57 27.396  +03 22 20.48  23.4z 16RV81    W84  C~52Zi      

The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.

     1   0.0000      0.00     0.05       0.00    -0.11
     2   0.8876      0.00    -0.15       0.00     0.19
     3   2.0508      0.00     0.15       0.00     0.04
     4   2.9383      0.00     0.06       0.00    -0.03
     5   2.9491      0.00     0.08       0.00    -0.18
     6   2.9492      0.00     0.02       0.00    -0.04
     7   3.1402      0.00     0.02       0.00     0.01
     8   3.1402      0.00    -0.13       0.00     0.04
     9   3.9976      0.00     0.18       0.00     0.13
    10   3.9976      0.00    -0.13       0.00     0.02
    11   4.0604      0.00    -0.09       0.00    -0.03
    12   4.9479      0.00     0.21       0.00     0.19
    13   4.9616      0.00    -0.03       0.00    -0.14
    14   4.9616      0.00    -0.04       0.00    -0.15
    15   4.9616      0.00    -0.24       0.00     0.15
    16   5.0543      0.00     0.14       0.00    -0.05

The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.

16RV81    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.649    45.649    45.650
ecceobj         0.157     0.157     0.157
incobj         21.381    21.381    21.381
qmin           37.717    37.731    37.698
qmax           53.363    53.457    53.362
amean          45.387    45.387    45.387
amin           45.013    45.025    45.015
amax           45.804    45.806    45.808
emean           0.152     0.152     0.152
emin            0.138     0.138     0.138
emax            0.166     0.167     0.166
imean          21.558    21.558    21.558
imin           21.173    21.175    21.174
imax           21.931    21.948    21.931
excite_mean     0.398     0.398     0.398
fracstop        1.000     1.000     1.000
cjmean          2.921     2.921     2.921

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
libcent 1      -180.0    -180.0    -180.0
libamp  1      -180.0    -180.0    -180.0
libcent 2      -180.0    -180.0    -180.0
libamp  2      -180.0    -180.0    -180.0
libcent 3      -180.0    -180.0    -180.0
libamp  3      -180.0    -180.0    -180.0
libcent 4      -180.0    -180.0    -180.0
libamp  4      -180.0    -180.0    -180.0

kozaimean       183.9     183.9     183.9
kozaiamp        179.9     179.9     179.9